DAC reduces cable head-end footprint

Analog Devices, Inc. has introduced an 11-bit digital-to-analog converter (DAC) that enables cable television and broadband operators to synthesize the cable spectrum up to 1 GHz into a single RF port consuming a maximum of 1.1 W of power. The manufacturer states that AD9737A 2.5-GSPS DACís wide bandwidth and dynamic range enable cable infrastructure designers to increase QAM (quadrature amplitude modulation) channel density by 20 times over present cable modem implementations to improve next-generation services such as interactive television, high-definition broadcasts and new specialty channels.

Key features:

Operates from 1.8-V and 3.3-V supplies for a total power consumption of 1.1 W maximum